prometheus: update for buster

README.md

@@ -7,7 +7,7 @@ The python package netaddr is required on the host running ansible.
 
 The vault password must be stored in `.vault_pass`.
 
-The *only* supported distribution to deploy roles on is debian stretch.
+The *only* supported distributions to deploy roles on is debian stretch and buster (stretch may be too old for prometheus).
 
 
 ## Running Ansible

roles/prometheus/tasks/main.yml

@@ -1,10 +1,7 @@
 ---
 
-- name: Enable backports for prometheus
-  apt_repository: repo='deb http://httpredir.debian.org/debian stretch-backports main'
-
 - name: Install prometheus
-  apt: name=prometheus default_release='stretch-backports'
+  apt: name=prometheus
 
 - name: Configure prometheus
   template: src=prometheus.yml.j2 dest=/etc/prometheus/prometheus.yml